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1. Year:1988 Make:MACK Model:DMM SERIES

   Manufacturer	Component Mfg	Component	Component	Description	Consequence	Corrective Action
   MACK TRUCKS, INC	MACK TRUCKS, INCORPORATED	ENGINE AND ENGINE COOLING:ENGINE	19881018	CERTAIN ENGINE SUPPORT CASTINGS WERE PRODUCED WITH FAULTY METALLURGY AND COULD FAIL.	FAILURE OF ONE OR BOTH BRACKETS COULD CAUSE DISLOCATIONOF ENGINE AND TRANSMISSION ASSEMBLY, WHICH COULD RESULT IN TRUCK DISABLEMENT,POSSIBLE LOSS OF ACCELERATOR CONTROL AND AN ACCIDENT.	REPLACE REAR ENGINE SUPPORTS AS NECESSARY.
   MACK TRUCKS, INC	MACK TRUCKS, INCORPORATED	STEERING:LINKAGES	19880727	SOME OF THE NUTS/BOLTS USED TO FASTEN THE STEERING PITMAN ARM MAY LOOSEN.	THIS WOULD ALLOW THE PITMAN ARM TO COME OFF THE STEERINGGEAR SECTOR SHAFT AND RESULT IN IMMEDIATE LOSS OF STEERING CONTROL AND A VEHICLECRASH COULD OCCUR.	RETORQUE NUTS/BOLTS WHERE NECESSARY.
   MACK TRUCKS, INC	MACK TRUCKS, INCORPORATED	POWER TRAIN:DRIVELINE:CENTER SUPPORT BEARING	19880523	CLAMP PLATES USED BETWEEN THE DRIVE SHAFT AND CARRIER YOKES MAY CRACK AND COULD BREAK DUE TO IMPROPER HEAT TREATMENT.	IF CLAMP PLATE BREAKS, YOKE WOULD FLY OFF AT DETACHEDPOINT AND COULD INJURY ANYONE STRUCK BY FLYING FRAGMENTS. ALSO, THE DETACHEDINNER SHAFT COULD INTERFERE WITH THE BRAKE SYSTEM AIR SUPPLY HOSES AND TRACTORTIRES, WHICH COULD RESULT IN LOSS OF TRUCK CONTROL AND AN ACCIDENT.	INSTALL NEW CLAMPING PLATES AND CAPSCREWS IN ALL LOCATIONS AS NEEDED.
   MACK TRUCKS, INC	MACK TRUCKS, INCORPORATED	STEERING:HYDRAULIC POWER ASSIST:HOSE, PIPING, AND CONNECTIONS	19890303	AN INCORRECT HIGH PRESSURE POWER STEERING HOSE MAY HAVE BEEN INSTALLED.	UNDER CERTAIN CONDITIONS, HOSE COULD FAIL RESULTING INLOSS OF POWER STEERING ASSIST AND POSSIBLY AN ACCIDENT.	REPLACE INCORRECT POWER STEERING HOSES.
   MACK TRUCKS, INC	MACK TRUCKS, INCORPORATED	SUSPENSION:REAR:SPRINGS	19890303	DOWELS MAY HAVE BEEN OMITTED DURING SPRING CAP INSTALLATION; THIS WOULD PUT SHEAR LOAD ON THE FOUR (4) SPRING CAP BOLTS.	THIS COULD RESULT IN LOOSENING AND FAILURE OF THE BOLTSWITH POSSIBLE LOSS OF CONTROL AND ACCIDENT POTENTIAL.	INSTALL THE MISSING DOWELS TO PREVENT MOVEMENT BETWEEN THE SPRING CAP AND AXLE HOUSING.

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